Traction mechanism



Feb. l0, 1931. I R- C. OSGOQD 1,792,114

TRAQTION. MEGHANISM Original Filed Oct. 8, 1921 longitudinalsection through my `improved Patented Feb. 1o, 1931 UNITED STATES PATENT Tier.

' `ROBERT c. oseoon, or cLAnnMoNT, NEWHAMPSHTRE, Assienon To sULLivAN MAf CHTNERY COMPANY, A CORPORATIONv or MASSACHUSETTS TRACTION MECHANISM Application` led October 8, 1921, Serial No. 506,325. Renewed January 30, 1930.

My invention relates to hoisting mechanisms, and more particularly to hoisting mechanisms of a portable double drum type.

An object of my invention is to provide an 5 improved hoisting mechanism. Another object of my invention is lto provide an im-` provedh'oisting mechanism of the double drum type. A further object of my invention is to provide an improved hoisting' mechanism of the double drum type in Which a single motor may `cooperate alternately with the drums of said hoist to effect rotation thereof. OtherA objects and .advantages of my improved mechanism -vvill be hereinafter apparent. l

In the accompanying drawing I have shown for Apurposes of illustration one form which Imy invention may assume in pract1ce. In this draWing,- Y Y 'The view isone mainly in central vertical hoisting mechanism, but having parts shown in elevation. j Y Y In the formof my invention which I have shown herein forpurposes'fof illustration, I

provide a main base 1 having upstandingV standards 2 and 3 at the opposite ends thereof and in these' standards I journal stub shafts 4, of which but one is shown, constituting'the supports lfor the remote ends of the drums 5 and V6. Intermediate the drums 5 Vand 6 is arranged a stationary housing 7 which has a hollow interior 8 in Which la motor generally indicated 9 isV arranged and which also contains a clutch chamber 10,V hereinafter more fully "describe-d, The motor 9 comprises a pair of intermeshing rotors V11 vand 12 provided vvith intemeshing tooth blades 13 cooperating upon rotation of the rotors to form expanding pockets in `a manner more fully set forth in the copending application of one Morris P.Holmes, Serial No. 255,797, filed vSeptember 26, 1918, novv Patent No. 1,520,- 242, granted fDec. 23, 1924, the motor per se not being my invention, but that of the said Holmes. j Y

Y The rotor 12 is provided with a shaft 14 u'ponwhich is secured a pinion 15 and the latter. meshes with a gear 16 mounted upon a te shaft 19 which is journaled yin a bearing 17 in one head of thermotor 9 and in a second i -thesame in a bearing 22 for the latter formed on the head 18.A A gear 23 is arranged in interme'shing relationship with the gearl211 and is disposed mainly Within 'the clutch housing 10 previously referred to. This gear, 'which y has a Wide face, issplined to a sleeve 24 which is rotatable upon a shaft 25, on one of Whose ends a pinion 26 is integrally formed or other- Wiserigidly secured. `Keyed to the shaft 25 is a clutch member 27 held against longitudinal movement relative to the shaft and hav? ing teeth 28 adapted to be engaged by clutch l teeth 29 formed on one end of the sleeve 24. A shifter 30 is arranged to cause the teeth 29 to engage With and to be freed from the teeth 28. Rotatahle relative to theV shaft 25, in' a bearing in the end of the casing 10, is a second sleeve 31 having a pinion `32 formed thereon and provided with clutch teeth 33 adapted to be enga-ged by teeth 34 formed on the pinion 23. It vvll thus be evidentthat by longitudinalmovement of the sleeve 24 the shaft 25 may be positively driven, causing rotation of the pinion 26, or the sleeve 31 may be rotated causing rotation of the pinion 32.

The drums 5 Vand 6 are respectively provided at their adjacent ends with internal gears 36 and 35 with which the pinions 26 and 32 are in constant mesh. AThe adjacent ends'of the drums 5 and 6 are journaled upon projecting stub shafts 37 and'38 secured to the ends of the central casing member 7. The drums 5v and 6 are each provided with braking means respectively designated .39 and 40 and as best shown at the left hand side of drum 5, comprising peripheral braking surit has operated in the rotors may be exhausted through openings, not shown, in the ends of the motor housing.

The mode of operation of this mechanism will be readilj7 apparent. Assume that the motor 9 is in operation and that the pinion l5 is being rotated in a counterclockwise direction (vier-:ed from the right hand end of the hoisting mechanism). By reason of the pinions 16 and 20 the pinion 2l will lilrewise be caused to rotate in a counterclocltwise direction and will rotate the pinion 23, which is, as will be evident, capable of a sliding movement without ruiming out of mesh with the pinion 2l, in a clockwise direction. New by moving the sleeve 24 toward the left, the clutch teeth 29 will be caused to engage the teeth 28 and the shaft 25 will be rotated, causing the pinion 26 to drive the internal gear in a clockwise direction. irccordingly, the iiexible member 5l wound counterclocl; rise on the drum 5 will be wound in. It` will be understood that during this time the drinn 6 may be either permitted to rotate freely, if there is a pull on the rope 52, by releasing` the braking mechanism 40, or may be held stationary. If now the sleeve 2libe shifted toward the right, the teeth 311- will engage the teeth 33 and drive the pinion rIhen the drum 6, by reason of the intermesh of the teeth of the gears 32 and 35, will be caused to rotate in clockwise direction and the cable 52 which is wound in a counterclockwise direction will be wound in, it being evident that the drum 5 may be free to rotate or heid stationary during this operation by slaclfeningl or tightening its respective brake band 42. In view of this explanation various further possible modes of operation and uses of this hoisting mechanism will present tl emselves to one skilled in the art and accordingly do not need detailed description.

lVhile I have in this application specilically described one form which my invention may assume in practice, it will be understood that this form ot the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing` from its spirit or the scope of the appended claims.

l/Vhat I claim as new and desire to secure by Letters Patent is:

l. In a hoisting mechanism, a stationary motor, a pair of relatively rotatable v 'l' n drums so disposed that said motor lies between and rotatably supports them, and speed reducing gearing between said motor and drums including a gear common to the driving of both drums, and means for connecting' said motor only alternatively to homologous elements of the speed reducing gearing-s of the different drums.

2. In a hoisting mechanism, a stationary motor, rotatable drums arranged one at each end of said motor, a driving Oear carried by n Ah t) v 1 each of said drums, a shaft having a gear iiXed thereon meshing with one of said driving gears and a gear loose thereon meshing with the other of said driving gears, and means driven by said motor and selectively connectible with said shaft or with said loose gear.

3. In a hoisting mechanism, a stationary motor, rotatable drums arranged one at each end of said motor, a driving gear carried by each of said drums, a shaft having a gear fixed thereon meshing with one of said driving gears and a gear loose thereon meshing with the other of said driving gears, and means including a sleeve rotatable on said shaft and driven bv said motor selectively connectible with said shaft or with said loose gear.

4. In a hoisting mechanism, a stationary motor, rotatable drums arranged one at each end of said motor, a driving gear carried by each of .said drums, a shaft having a gear fixed thereon meshing with one of said driving gears and a gear loose thereon meshing with the other of said driving gears, and means including a sleeve rotatable on said shaft and driven by said motor selectively connectible with said shaft or Vwith said loose gear, said sha-ft, said loose gear, and said sleeve having` clutch teeth formed thereon and adapted to connect either of said first two elements with the last.

5. In a hoisting mechanism, a stationary motor housing having parallel rotor chambers therein, cooperating rotors in said chambers, drums rotatable about axes parallel to the axes of said rotors and rotatably supported by opposite ends of said housing, and reducing gearing disposed within said housing and comprising a plurality of intermeshing elements which transmit power to the drums transversely of the drum axes, the axes of rotation of said rotors, said drums and said reducing gearing elements lying in a single plane.

6. In a hoisting mechanism, a motor having a stationary casing, a drum disposed at cach end thereof, said casing providing Ijournal means for each of said drums, a driving connection between said motor and drums including a gear disposed between the ends of said motor casing, a shaft extending longie tudinally of said motor on the outside thereof and carrying gear meshing with said other gear, and directly cooperating gears carried by said drums and said shaft.

7. In a hoisting mechanism, a motor, a pair of relatively rotatable winding drums one .arranged at each end of said motor, a driving gear carried by each of said drums, a shaft having a gear fixed thereon meshing with one of said driving gears, a gear loose on said shaft meshing with the other of said driving gears, and means driven by said motor and alternatively connectible with said shaft and with said loose gear.

gears, and means including a sleeve rotatable on said snaft and driven by said motor alternatively connectible with said shaft and with said loose gear.

9. In a hoisting mechanism, a pair of relatively rotatablev coaxial winding drums, a stationary motor intermediate said drums and rotatably supporting the same, driving gearing between one end of said motor and said. drums including only constantly meshing gears, and means disposed between the adjacent ends of said drums and slidablelongitudinally with reference to the axes of said drums for only alternatively connecting said motor in driving vrelation with said drums.

10. In a hoisting mechanism, a pair of relatively rotatable winding drums arranged coaxially with each other, a stationary motor between said drums and rotatably supporting the same, and driving connections between said motor and drums including asliaft common to each of said drums, said shaft being disposed parallel to said motor and having means slidable longitudinally with reference to the axes of said drums for only ternatively connecting the motorm driving relation with said drums.

11. In a hoisting mechanism, a pair of relatively rotatable coaxial winding drums, a stationary motor alined with and disposed between said drums and rotatably supporting the same,'and means for driving said drums from one end of said motor comprising reduction gearing driven from one end of said motor, said gearing being in mesh at all times and driving control means for mechanically connecting or disconnecting said motor in driving relation to either of said drums.

12. In a hoisting mechanism, a casing having a motor disposed therein and an end chamber, a pair of relatively rotatable winding drums rotatably supported byfsaid casing and driving connections between said 'drums between which gears, a pinion coaxial with said shaft andV rotatable relative thereto and meshing with vthe other drum gear, and power transmission connections including gearing connecting said motor pinion with said other pinions.

15. In a hoisting mechanism, a stationary motor, rotatable drums arranged one at each end of said motor, driving gears carried one by each of said drums, coaxial drivingpinions constantly meshing respectively with said driving gears, a gear driven by said motor disposed intermediate and coaxial with said pinions, and means for connecting said driving gear alternatively to said pinions to drive the latter. l

16. In a hoisting mechanism, a stationary motor, a pair of relatively rotatable winding said motor is disposed and for each of which said motor provides a bearing, and speed reducing gearing between said motor and drums including a gear common to drive of both drums, and means for connecting saidV gear only alternatively to homologous elements of the speed reducing vgearings of the different drums.

17. In a hoisting mechanism, a pair of relatively rotatable winding drums arranged co- Vaxially with each other, a stationary motor `nomini c. oseoon motor and said drumscomprising an inner y set of gears disposed in said chamber and an outer set of gears disposed outside of said chamber,'the inner and outer sets of gears being connected to each other by a meshing action between a gear of each set. y

18; A mechanism as set forth in claim 11 having a common clutch member controlling the driving connections between the.motor and both drums.

14. In a hoisting mechanism, a stationary casing housing a motor, said motor having a motor pinion, a pair of relatively rotatable coaxial winding drums one disposed at an 

